Buckle for helmet strap



FIG. 1 is a top perspective view of a buckle for helmet strap showing our new design;

FIG. 2 is a bottom perspective view of the buckle for helmet strap of FIG. 1;

FIG. 3 is a top plan view of the buckle for helmet strap of FIG. 1;

FIG. 4 is a bottom plan view of the buckle for helmet strap of FIG. 1;

FIG. 5 is a right side elevation of the buckle for helmet strap of FIG. 1;

FIG. 6 is a left side elevation of the buckle for helmet strap of FIG. 1;

FIG. 7 is a front side elevation of the buckle for helmet strap of FIG. 1; and,

FIG. 8 is a rear side elevation of the buckle for helmet strap of FIG. 1.

The broken lines are included for the purpose of illustrating portions of the buckle for helmet strap that form no part of the claimed design. 

CLAIM The ornamental design for a buckle for helmet strap, as shown and described. 